Mercurial > hg
annotate mercurial/pathutil.py @ 20555:4add43865a9b
ancestors: remove unnecessary handling of 'left'
If one of the initial nodes also is an ancestor then that most be the only
ancestor. There is no need for additional bookkeeping.
author | Mads Kiilerich <madski@unity3d.com> |
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date | Mon, 24 Feb 2014 22:42:13 +0100 |
parents | f962870712da |
children | 8dd17b19e722 |
rev | line source |
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20033
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1 import os, errno, stat |
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2 |
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3 import util |
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4 from i18n import _ |
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5 |
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6 class pathauditor(object): |
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7 '''ensure that a filesystem path contains no banned components. |
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8 the following properties of a path are checked: |
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9 |
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10 - ends with a directory separator |
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11 - under top-level .hg |
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12 - starts at the root of a windows drive |
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13 - contains ".." |
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14 - traverses a symlink (e.g. a/symlink_here/b) |
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15 - inside a nested repository (a callback can be used to approve |
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16 some nested repositories, e.g., subrepositories) |
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17 ''' |
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18 |
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19 def __init__(self, root, callback=None): |
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20 self.audited = set() |
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21 self.auditeddir = set() |
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22 self.root = root |
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23 self.callback = callback |
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24 if os.path.lexists(root) and not util.checkcase(root): |
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25 self.normcase = util.normcase |
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26 else: |
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27 self.normcase = lambda x: x |
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28 |
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29 def __call__(self, path): |
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30 '''Check the relative path. |
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31 path may contain a pattern (e.g. foodir/**.txt)''' |
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32 |
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33 path = util.localpath(path) |
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34 normpath = self.normcase(path) |
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35 if normpath in self.audited: |
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36 return |
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37 # AIX ignores "/" at end of path, others raise EISDIR. |
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38 if util.endswithsep(path): |
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39 raise util.Abort(_("path ends in directory separator: %s") % path) |
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40 parts = util.splitpath(path) |
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41 if (os.path.splitdrive(path)[0] |
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42 or parts[0].lower() in ('.hg', '.hg.', '') |
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43 or os.pardir in parts): |
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44 raise util.Abort(_("path contains illegal component: %s") % path) |
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45 if '.hg' in path.lower(): |
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46 lparts = [p.lower() for p in parts] |
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47 for p in '.hg', '.hg.': |
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48 if p in lparts[1:]: |
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49 pos = lparts.index(p) |
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50 base = os.path.join(*parts[:pos]) |
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51 raise util.Abort(_("path '%s' is inside nested repo %r") |
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52 % (path, base)) |
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53 |
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54 normparts = util.splitpath(normpath) |
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55 assert len(parts) == len(normparts) |
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56 |
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57 parts.pop() |
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58 normparts.pop() |
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59 prefixes = [] |
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60 while parts: |
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61 prefix = os.sep.join(parts) |
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62 normprefix = os.sep.join(normparts) |
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63 if normprefix in self.auditeddir: |
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64 break |
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65 curpath = os.path.join(self.root, prefix) |
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66 try: |
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67 st = os.lstat(curpath) |
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68 except OSError, err: |
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69 # EINVAL can be raised as invalid path syntax under win32. |
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70 # They must be ignored for patterns can be checked too. |
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71 if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL): |
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72 raise |
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73 else: |
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74 if stat.S_ISLNK(st.st_mode): |
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75 raise util.Abort( |
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76 _('path %r traverses symbolic link %r') |
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77 % (path, prefix)) |
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78 elif (stat.S_ISDIR(st.st_mode) and |
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79 os.path.isdir(os.path.join(curpath, '.hg'))): |
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80 if not self.callback or not self.callback(curpath): |
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81 raise util.Abort(_("path '%s' is inside nested " |
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82 "repo %r") |
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83 % (path, prefix)) |
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84 prefixes.append(normprefix) |
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85 parts.pop() |
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86 normparts.pop() |
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87 |
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88 self.audited.add(normpath) |
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89 # only add prefixes to the cache after checking everything: we don't |
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90 # want to add "foo/bar/baz" before checking if there's a "foo/.hg" |
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91 self.auditeddir.update(prefixes) |
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92 |
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93 def check(self, path): |
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94 try: |
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95 self(path) |
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96 return True |
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97 except (OSError, util.Abort): |
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98 return False |
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99 |
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100 def canonpath(root, cwd, myname, auditor=None): |
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101 '''return the canonical path of myname, given cwd and root''' |
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102 if util.endswithsep(root): |
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103 rootsep = root |
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104 else: |
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105 rootsep = root + os.sep |
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106 name = myname |
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107 if not os.path.isabs(name): |
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108 name = os.path.join(root, cwd, name) |
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109 name = os.path.normpath(name) |
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110 if auditor is None: |
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111 auditor = pathauditor(root) |
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112 if name != rootsep and name.startswith(rootsep): |
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113 name = name[len(rootsep):] |
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114 auditor(name) |
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115 return util.pconvert(name) |
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116 elif name == root: |
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117 return '' |
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118 else: |
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119 # Determine whether `name' is in the hierarchy at or beneath `root', |
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120 # by iterating name=dirname(name) until that causes no change (can't |
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121 # check name == '/', because that doesn't work on windows). The list |
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122 # `rel' holds the reversed list of components making up the relative |
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123 # file name we want. |
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124 rel = [] |
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125 while True: |
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126 try: |
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127 s = util.samefile(name, root) |
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128 except OSError: |
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129 s = False |
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130 if s: |
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131 if not rel: |
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132 # name was actually the same as root (maybe a symlink) |
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133 return '' |
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134 rel.reverse() |
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135 name = os.path.join(*rel) |
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136 auditor(name) |
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137 return util.pconvert(name) |
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138 dirname, basename = util.split(name) |
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139 rel.append(basename) |
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140 if dirname == name: |
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141 break |
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142 name = dirname |
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143 |
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144 raise util.Abort(_("%s not under root '%s'") % (myname, root)) |